package com.taochaplan;



import org.osgeo.proj4j.*;

import java.awt.geom.Point2D;

/**
 * Copyright (c) 2017 ByWin.Co.Ltd. All rights reserved.
 * CreateUser: xiejibin
 * CreateTime: 2017-11-29 1:47
 * Description:
 */
public class GPSUtil {
    public static double pi = 3.1415926535897932384626;
    public static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
    public static double a = 6378245.0;
    public static double ee = 0.00669342162296594323;

    public static double transformLat(double x, double y) {
        double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y
                + 0.2 * Math.sqrt(Math.abs(x));
        ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
        ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
        ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
        return ret;
    }

    public static double transformLon(double x, double y) {
        double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1
                * Math.sqrt(Math.abs(x));
        ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
        ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
        ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0
                * pi)) * 2.0 / 3.0;
        return ret;
    }
    public static double[] transform(double lat, double lon) {
        if (outOfChina(lat, lon)) {
            return new double[]{lat,lon};
        }
        double dLat = transformLat(lon - 105.0, lat - 35.0);
        double dLon = transformLon(lon - 105.0, lat - 35.0);
        double radLat = lat / 180.0 * pi;
        double magic = Math.sin(radLat);
        magic = 1 - ee * magic * magic;
        double sqrtMagic = Math.sqrt(magic);
        dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
        dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
        double mgLat = lat + dLat;
        double mgLon = lon + dLon;
        return new double[]{mgLat,mgLon};
    }
    public static boolean outOfChina(double lat, double lon) {
        if (lon < 72.004 || lon > 137.8347)
            return true;
        if (lat < 0.8293 || lat > 55.8271)
            return true;
        return false;
    }
    /**
     * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
     *
     * @param lat
     * @param lon
     * @return
     */
    public static double[] gps84_To_Gcj02(double lat, double lon) {
        if (outOfChina(lat, lon)) {
            return new double[]{lat,lon};
        }
        double dLat = transformLat(lon - 105.0, lat - 35.0);
        double dLon = transformLon(lon - 105.0, lat - 35.0);
        double radLat = lat / 180.0 * pi;
        double magic = Math.sin(radLat);
        magic = 1 - ee * magic * magic;
        double sqrtMagic = Math.sqrt(magic);
        dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
        dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
        double mgLat = lat + dLat;
        double mgLon = lon + dLon;
        return new double[]{mgLat, mgLon};
    }

    /**
     * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
     * */
    public static double[] gcj02_To_Gps84(double lat, double lon) {
        double[] gps = transform(lat, lon);
        double lontitude = lon * 2 - gps[1];
        double latitude = lat * 2 - gps[0];
        return new double[]{latitude, lontitude};
    }
    /**
     * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标
     *
     * @param lat
     * @param lon
     */
    public static double[] gcj02_To_Bd09(double lat, double lon) {
        double x = lon, y = lat;
        double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
        double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
        double tempLon = z * Math.cos(theta) + 0.0065;
        double tempLat = z * Math.sin(theta) + 0.006;
        double[] gps = {tempLat,tempLon};
        return gps;
    }

    /**
     * * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标 * * @param
     * bd_lat * @param bd_lon * @return
     */
    public static double[] bd09_To_Gcj02(double lat, double lon) {
        double x = lon - 0.0065, y = lat - 0.006;
        double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
        double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
        double tempLon = z * Math.cos(theta);
        double tempLat = z * Math.sin(theta);
        double[] gps = {tempLat,tempLon};
        return gps;
    }

    /**将gps84转为bd09
     * @param lat
     * @param lon
     * @return
     */
    public static double[] gps84_To_bd09(double lat,double lon){
        double[] gcj02 = gps84_To_Gcj02(lat,lon);
        double[] bd09 = gcj02_To_Bd09(gcj02[0],gcj02[1]);
        return bd09;
    }
    public static double[] bd09_To_gps84(double lat,double lon){
        double[] gcj02 = bd09_To_Gcj02(lat, lon);
        double[] gps84 = gcj02_To_Gps84(gcj02[0], gcj02[1]);
        //保留小数点后六位
        gps84[0] = retain6(gps84[0]);
        gps84[1] = retain6(gps84[1]);
        return gps84;
    }

    /**保留小数点后六位
     * @param num
     * @return
     */
    public static double retain6(double num){
        String result = String .format("%.6f", num);
        return Double.valueOf(result);
    }


    /**
     *  澳门坐标系 --> wgs84(gps)坐标系
     * @param x
     * @param y
     * @return
     */
    public static Point2D.Double transformToWgs84(Double x, Double y) {
        //String paramStr = "+proj=tmerc +lat_0=22.21239722222222 +lon_0=113.5364694444445 +k=1 +x_0=20000 +y_0=20000 +ellps=GRS80 +units=m +no_defs +towgs84=-202.856,-303.990,-155.873,-34.079,76.126,32.660,6.096";
       // String paramStr = "+proj=longlat +datum=WGS84 +no_defs";
        String paramStr = "+proj=tmerc +lat_0=22.21239722222222 +lon_0=113.5364694444445 +k=1 +x_0=20000 +y_0=20000 +ellps=intl +units=m +no_defs";
        //+proj=tmerc +lat_0=22.21239722222222 +lon_0=113.5364694444445 +k=1 +x_0=20000 +y_0=20000 +ellps=intl +units=m +no_defs
        String sourceCRS="SR-ORG:8239";
        String targetCRS="EPSG:4326";
        Point2D.Double destPosition = new Point2D.Double();
        CRSFactory factory = new CRSFactory();
        // Use "EPSG:3857" here instead of 900913.
        CoordinateReferenceSystem srcCrs = factory.createFromParameters(sourceCRS,paramStr);
        // Use "EPSG:4326 here.
        CoordinateReferenceSystem destCrs = factory.createFromName(targetCRS);
        CoordinateTransform transform = new CoordinateTransformFactory().createTransform(srcCrs, destCrs);
        ProjCoordinate srcCoord = new ProjCoordinate(x, y);
        ProjCoordinate destCoord = new ProjCoordinate();
        transform.transform(srcCoord, destCoord);
        destPosition.setLocation(destCoord.x, destCoord.y);
        return destPosition;
    }

    public static Double[] tdsptrans(Double x, Double y){
        Double[] tdspd = new Double[2];
        Double[][] pycs = {{307.377}, {-133.374}};
        Double[][] xzzx = {{21688.365}, {14963.270}};
        double a = Math.toRadians(29.586/3600) + (1/60);
        Double[][] cdcs = {{Math.cos(a), Math.sin(a)},{-Math.sin(a), Math.cos(a)}};
        Double[][] xy = {{x-xzzx[0][0]}, {y-xzzx[1][0]}};
        Double[][] pmzb = add(add(pycs, xzzx), mul(kMul(cdcs, (1+6.513/1000000)), xy));
        tdspd[0] = pmzb[0][0];
        tdspd[1] = pmzb[1][0];
        return tdspd;
    }


    //矩阵数乘
    public static Double[][] kMul(Double[][] A,Double k)
    {
        Double[][] AA=new Double[A.length][A[0].length];
        for(int i=0;i<A.length;i++)
        {
            for(int j=0;j<A[0].length;j++)
            {
                AA[i][j]=k*A[i][j];
            }
        }
        return AA;
    }
    //矩阵相乘
    public static Double[][] mul(Double A[][],Double B[][])
    {
        //矩阵能相乘的条件：A的列数等于B的行数
        if(A[0].length!=B.length)
            return null;

        Double[][] C=new Double[A.length][B[0].length];

        for(int i=0;i<C.length;i++)//遍历相乘之后的数组的行 ：2,等于A矩阵的行
        {
            for(int j=0;j<C[i].length;j++)//遍历相乘后的数组的列 等于B矩阵的列
            {
                for(int k=0;k<A[0].length;k++)//遍历 A矩阵的列，也是B矩阵的行
                {
                    if(C[i][j]==null){
                        C[i][j]=A[i][k]*B[k][j];
                    }else{
                        C[i][j]+=A[i][k]*B[k][j];
                    }
                }
            }
        }
        return C;
    }
    //  矩阵相加
    public static Double[][] add(Double A[][],Double B[][])
    {
        if(A.length!=B.length||A[0].length!=B[0].length)
        {
            return null;//如果说行数不相等
        }
        Double[][] C=new Double[A.length][A[0].length];
        for(int i=0;i<A.length;i++)
        {
            for(int j=0;j<A[0].length;j++)
            {
                C[i][j]=A[i][j]+B[i][j];
            }
        }
        return C;
    }

    public static void main(String[] args) {
        double jd=120.209947;
        double wd=30.245853;

        System.out.println("高德坐标"+jd+","+wd);
        double[] jwd_09 = gcj02_To_Bd09(jd,wd);
        System.out.println("gcj02_To_Bd09:"+jwd_09[0]+","+jwd_09[1]);

        double[] jwd_84 = bd09_To_gps84(jwd_09[0],jwd_09[1]);
        System.out.println("bd09_To_gps84:"+jwd_84[0]+","+jwd_84[1]);

        jwd_09 = gps84_To_bd09(jwd_84[0],jwd_84[1]);
        System.out.println("gps84_To_bd09:"+jwd_09[0]+","+jwd_09[1]);

        double[] gcj_02 = bd09_To_Gcj02(jwd_09[0],jwd_09[1]);
        System.out.println("bd09_To_Gcj02:"+gcj_02[0]+","+gcj_02[1]);

        jwd_84 = gcj02_To_Gps84(gcj_02[0],gcj_02[1]);
        System.out.println("gcj02_To_Gps84:"+jwd_84[0]+","+jwd_84[1]);

        gcj_02 = gps84_To_Gcj02(jwd_84[0],jwd_84[1]);
        System.out.println("gps84_To_Gcj02:"+gcj_02[0]+","+gcj_02[1]);

    }

}
